name: Diffusion CI Ground Truth Generation

on:
  workflow_dispatch:
    inputs:
      ref:
        description: 'Git ref to checkout'
        required: false
        default: ''
        type: string
      case_ids:
        description: 'Specific case IDs to run (space-separated, optional)'
        required: false
        default: ''
        type: string

concurrency:
  group: diffusion-ci-gt-gen-${{ github.ref }}
  cancel-in-progress: true

permissions:
  contents: write
  actions: read

jobs:
  multimodal-diffusion-gen-1gpu:
    if: github.repository == 'sgl-project/sglang'
    runs-on: 1-gpu-h100
    strategy:
      matrix:
        part: [0, 1]
    timeout-minutes: 150
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          ref: ${{ inputs.ref || github.ref }}

      - name: Install dependencies
        run: bash scripts/ci/cuda/ci_install_dependency.sh diffusion

      - name: Generate outputs
        run: |
          cd python
          python -m sglang.multimodal_gen.test.scripts.gen_diffusion_ci_outputs \
            --suite 1-gpu \
            --partition-id ${{ matrix.part }} \
            --total-partitions 2 \
            --out-dir ./diffusion-ci-outputs \
            ${{ inputs.case_ids != '' && format('--case-ids {0}', inputs.case_ids) || '' }}

      - name: Upload artifact
        uses: actions/upload-artifact@v4
        with:
          name: diffusion-gen-1gpu-part${{ matrix.part }}
          path: python/diffusion-ci-outputs
          retention-days: 7

  multimodal-diffusion-gen-2gpu:
    if: github.repository == 'sgl-project/sglang'
    runs-on: 2-gpu-h100
    strategy:
      matrix:
        part: [0, 1]
    timeout-minutes: 150
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          ref: ${{ inputs.ref || github.ref }}

      - name: Install dependencies
        run: bash scripts/ci/cuda/ci_install_dependency.sh diffusion

      - name: Generate outputs
        run: |
          cd python
          python -m sglang.multimodal_gen.test.scripts.gen_diffusion_ci_outputs \
            --suite 2-gpu \
            --partition-id ${{ matrix.part }} \
            --total-partitions 2 \
            --out-dir ./diffusion-ci-outputs \
            ${{ inputs.case_ids != '' && format('--case-ids {0}', inputs.case_ids) || '' }}

      - name: Upload artifact
        uses: actions/upload-artifact@v4
        with:
          name: diffusion-gen-2gpu-part${{ matrix.part }}
          path: python/diffusion-ci-outputs
          retention-days: 7

  diffusion-ci-push:
    needs: [multimodal-diffusion-gen-1gpu, multimodal-diffusion-gen-2gpu]
    if: github.repository == 'sgl-project/sglang'
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Download artifacts
        uses: actions/download-artifact@v4
        with:
          pattern: diffusion-gen-*
          path: combined
          merge-multiple: true

      - name: Collect image files
        run: |
          mkdir -p gt_images
          find combined \( -name "*.png" -o -name "*.jpg" -o -name "*.jpeg" -o -name "*.webp" \) -type f -exec cp -f {} gt_images/ \;

      - name: Publish GT images to sglang-bot/sglang-ci-data
        env:
          GITHUB_TOKEN: ${{ secrets.GH_PAT_FOR_NIGHTLY_CI_DATA }}
        run: python scripts/ci/utils/diffusion/publish_diffusion_gt.py --source-dir gt_images